[R] Plot with Julian dates.

[Spencer Graves]

	  1.  Are you familiar with the zoo package and vignette (as described, 
e.g., in
http://finzi.psych.upenn.edu/R/Rhelp02a/archive/60217.html)?

	  2.  If yes and if you would like further help from this listserve, 
PLEASE do read the posting guide "www.R-project.org/posting-guide.html" 
and provide commented, minimal, self-contained, reproducible code with 
future posts.  The absence of appropriately "commented, minimal, 
self-contained, reproducible code" inhibits me from commenting further 
on this issue at this time.

	  Hope this helps.
	  Spencer Graves

C. Park wrote:
> Dear Sir/Madam:
> 
> I simply want to draw x-y plot with Julian dates (x) and numbers (y).
> Please see below for my program.
> 
> In the older version of R, the plot(jdat, miles) worked without any problem.
> But, with the new version of R, plot(jdat, miles) does not work any more. 
> So, I added log="" option (as far as I know, it is a default setting, so
> log="" should not be needed). 
> Now, it works with log="" option. But it is weird to me. 
> 
> I also check
> plot( jdat, miles, log="", type="p")
> 
> The option type="p" is also a default. So it should be the same as 
> plot( jdat, miles, log=""). The figures are the same, but the one with 
> type="p" option yields a warning message. 
> 
> Do you think it is a R bug?
> Thanks for your valuable time.
> C. Park
> 
> Note: I used the following R version                         
> platform       i686-redhat-linux-gnu     
> arch           i686                      
> os             linux-gnu                 
> system         i686, linux-gnu           
> status                                   
> major          2                         
> minor          3.1                       
> year           2006                      
> month          06                        
> day            01                        
> svn rev        38247                     
> language       R                         
> version.string Version 2.3.1 (2006-06-01)
> 
> ##=========================================
> ## Here is my program
> ##=========================================
> 
> library(survival)
> 
> dat = c( "12-5-1995",  "12-30-1995", "8-27-1996", "11-20-1996", "8-29-1997",
>          "11-7-1997",  "4-4-1998",   "7-15-1998", "11-2-1998",  "1-16-1999" )
> miles = c(106,   1468, 7298, 7935, 13440,  14460, 17132, 20214, 22802, 24724 )
> jdat = as.date(dat)   ## Convert to Julian date form.
> 
>  plot( jdat, miles )   ## Not working
> Error in plot.window(xlim, ylim, log, asp, ...) : 
>         "log=" specification must be character
> 
>  plot( jdat, miles, log="" )  ## Works
> 
>  plot( jdat, miles, log="", type="p") ## Works, but warning messages
> Warning message:
> graphical parameter "type" is obsolete in: axis(side, at, labels, tick, line,
> pos, outer, font, lty, lwd,
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.